<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8" />
        <title>3.列表过滤-watch实现</title>
        <!-- 引入Vue -->
        <script type="text/javascript" src="../js/vue.js"></script>
    </head>
    <body>
        <!-- 准备好一个容器-->
        <div id="demo">
			<h2>人员列表</h2>
			<input type="text" v-model="keyWord">
			<ul>
				<li v-for="p in persons2" :key="p.id">
					{{p.name}} - {{p.age}} - {{p.gender}}
				</li>
			</ul>
		</div>
    </body>

    <script type="text/javascript">
        //阻止 vue 在启动时生成生产提示。
        Vue.config.productionTip = false
        new Vue({
            el:'#demo',
			data:{
				keyWord:'',
				persons:[
					{id:'001',name:'马冬梅',age:19,gender:'女'},
					{id:'002',name:'周冬雨',age:20,gender:'女'},
					{id:'003',name:'周杰伦',age:21,gender:'男'},
					{id:'004',name:'帅邓伦',age:22,gender:'男'},
				],
				
			},
            computed: {
              persons2(){
                //   let newPerson=this.persons.filter((item)=>{
                //     return item.name.indexOf(this.keyWord)!==-1
                //   })
                // // 计算属性靠返回值实现
                //   return newPerson

                //简写方式

                 // 计算属性靠返回值实现
                return newPerson=this.persons.filter((item)=>{
                    return item.name.indexOf(this.keyWord)!==-1
                  })      
              }
            }
           
        })
    </script>
</html>